Enlarging tool for wells



July 16, 1935. J. H. JANSSEN 2,008,583

ENLARGING TOOL FOR WELLS Filed Jan. 14, 1935 INVENTOR ATTORN EY Patented July 16, 1935 UNITED STATES PATENTOFFICE ENLARGING TOOL FOR WELLS John H. Janssen, Woonsocket, S. Dal(. Application January 1 4, 1935, Serial No. 1,799

4 Claims.

bore can be gradually and expeditiously enlarged with very little effort.

Another object of the invention is to provide a well enlarging tool that is not only controllable from the surface of the well for adjusting and disposing the toolinto and out of active use, but the tool is also rotated from the surface to cause the same to perform its cutting function and the means for actuating the controlling means can be means" to be dropped into the pipe to remove the matter from the well that has been cut by the tool. I

A still further object of the invention is to provide a well tool of the character set forth, that is simple in construction, easy to handle, inexpensive to manufacture, and extremely eflicient in operation, use and service.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully'described, illustrated in the accompanying drawing and specifically pointed out in theappended claims.

In describing my invention in detail, reference will be had to the accompanying drawing wherein, like characters denote like or corresponding parts throughout the several views, and in which: Figure l is a front view of the tool which forms the subject matter of the present invention.

Figure 2 is a longitudinal sectional view taken therethrough, with parts in elevation.

Figure 3v is a sectional view taken approximately on line 3-3 of Figure 2.

Figure 4 is a detail view of the wedging and" adjusting means for the cutting device.

Referring to the drawing in detail, my tool includesa hollow cylindrical body that provides a housing I and which has open upper and lower ends with a relatively large slot 2 arranged longitudinally therein for the passage of the scraping or cutting means in a manner and for a purpose which will be presently described.

The scraping or cutting means includes a lever 3 that is enlarged preferably midway its ends with removed fromthe tubeor pipe, to allow pumping a bearing opening extending through the enlarged portion to receive a shaft 4 which bridges the housing and has its ends fixed therein, but the lever 3 is pivotally mounted on the shaft, as will be apparent, and spacing collars are disposed upon the shaft on opposite sides or; the enlarged portionof the lever 3 so that the latter will be arranged midway the ends of the shaft for swinging movement. Formed on the lower end of the lever 3 is the head 5 of the scraping and cutting means and this head is of substantially U-shaped c'onfigura tion in that the strip of material providing the head and 'lever extends from the lever at a slight downward inclination and thence is looped upon itself and directed rearwardly in spaced parallel relation withthe downward inclined portion as clearly shown in Figure 2. That portion and the rearwardly directed portion are held in spaced relationwith respect to each other through the instrumentality of spacing collars 6, that sur round securing means such as headed pins 1 that extend through the respective portions as clearly shown in: Figure 2. The outer end of they head is preferably enlarged as at 8 and this enlarged portion may be beveled to provide a cutting edge 9. However, the rearwardly directed portion may be eliminated and a steel shoe bolted tothe underside of the downwardly inclined portion. Any type of cutting blade may then be secured to the inclined portion. v I

The upper end of the housing is interiorly threaded toreceive aplug IS, the latter having a threaded bore arranged therein. to threadedly receive. one end of a short section of pipe I I and the opposite end of said pipe I i has connected thereto through the instrumentality of a collar I2, a nipple. l3.. Connectedto the upper end of the nipple l3 through the medium of a collar I4 is the lower section l5 of the casing that extends through to the. surface of the well. The connecting collars I 2 and 14 have secured thereto a spirally arranged strap l6 which is generallytermed a spanner for securing these collars in fixed relation with respect to each other, and cooperating with the spanner in order to provide a locked joint, or in other words to positively fix the collars to the pipe sections, I provide boltsas shown, which extend through the collars and pipe sections, therefore it is impossible for the joints to become casually disconnected. Locked joints for the pipe sections are absolutely essential, as the tubing or pipe is rotated to cause the tool to perform its cutting flmction.

Arranged in the housing adjacent to the upper end is a strip plate I! provided with a centrally disposed opening l8 with diametrically arranged outwardly extending notches I 9 communicating with the opening'as best shown in Figure 3.

The opening l9 receives the shank 20 of the wedge or adjusting member 2| for the scraping or cutting tool, and the'shank 20 is provided with tongues 22 arranged longitudinally on diametrically opposite sides thereof to be received in the notches 19 to prevent rotation of the member 2| within the housing When my tool is in use. I

The wedge or adjusting member for the scraping or cutting means is in the form of a frame provided with a right angle portion that has connected to the ends thereof, the ends of a concaved curved portion 23 which is provided with a plurality of threaded openings 24, any one of which being adapted to receive a screw bolt for adjustably mounting a stop member 25 for disposal in the path of the upper free end of the lever 3, as clearly shownin Figure 2. s

It will be noted that the lower ends of the tongues 22 are spaced from the upper portion of the member 2! for a purpose which will be presently described. The shank 22 is provided with a threaded. upper end to receive a collar 26 for the purpose of connecting the lower end of a pipe or rodiil thereto and which extends to the surface, so that the adjusting member can beactuated therefrom.

In the use of my tool, it will be obvious that it is lowered into the well after the stop member 25 has been arranged in the proper position, it depending upon the size of the opening desired to be scraped or cut, and the shank 20 is of course raised and given a quarter turn so that the lower ends of the tongues 22 will rest upon the plate ll for disposing the member 2! to the dotted line position 'of Figure 2. When in this position,

the scraping and cutting means is likewise arranged to the dotted line position of this figure, due to the fact that the head thereof is relatively heavy and is normally retained by gravity with-- in the housing. When it is desired to put the tool into scraping or cutting action, the shank 20 is given a quarter turn to align the tongues 22 with the notches it, therefore the member 2| can be lowered for disposing the curved portion 23 in engagementwith the upperend of the lever 3, so that the head can be extended through the slot 2 as shown in full lines in Figure 2. When the proper opening is made, the pipe or rod 21 is removed from the shank iill'aswell as from the casing, to allow suitable pumping means to be lowered into the casing to remove the scraped orcut matter from the well.

It will be obvious that the housing is rotated in an oscillatory manner which will naturally cause the cutting edge 9 of the head to scrape the walls of the well to enlarge the same, and with a view of penetrating or opening producing strata or sands not hit in sinking the'well.

It is'thought from the foregoing description that the advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

What I claim is:

1; A well enlarging device comprising a housing having a slot therein, tubing secured to and rising from said housing and including locked joints, cutting and scraping means pivotally mounted in said housing and including a cutting head normally disposed therein, means slidably mounted in said housing and engageable with the cutting and scraping means for adjustably disposing the head'through the slot for'active use,

means for controlling the sliding means from the surface of the well and means for holding the sliding means out of engagement with the cutting and scraping means.

2. A Wellenlarging tool comprising a housing,

cutting and scraping means including a lever,

pivotally mounted in said housing, a head carried by the lever and normally disposed within the housing, cutting means for the head, means engageable with the lever for adjustably disposing the head exteriorly of the housing for active use and being slidably mounted in the housing, means for controlling the slidably mounted means from the surface of the well, means forholding the slidably mounted meansout of engagement with the lever and means for disconnectingthecomtrolling means from the surface of the well.

3. A well enlarging tool comprising a cylindrical housing having a slot disposed longitudinally therein, tubing for the housing, a leverpivotally mounted in said housing, a head carried by the lever and normally held by gravity within thehousing, cutting means for the head, adjustable means slidably mounted in said housing for engagement with the lever for disposing the head through the slot for active use, means included in the slidably mounted means for varying the position of the head through the slot, meansffor holding the slidably mounted means out of engagement with the lever, means forcontrolling the slidably mounted means from the surface of the well, means for disconnecting the controlling means from the slidably mounted means from the surface, and said housing being adapted to be rotated by the tubing for rotating the head and its cutting means. a V V 4. A well enlarging tool comprising a housing,

a lever pivotally mounted in said housing, a head on the lever and including cutting means, said head being normally held by gravity within-the housing, means mounted for slidable movement in the housing, adjustable means carried by the slidably mounted means for engagement withthe lever to dispose the cutting means exteriorly of the housing for activeuse and at various positions with respect to the housing, a shank included in the slidably mounted means, meansin the housing and carried by the shank for guiding the slidably mounted means and holding the latter out of engagtment with the lever, means controlled from the surface of the well for actuating the slidably mounted means and detachably connected with the shank for removal therefrom and said housing being adapted to be rotated when the cutting means is in active: use to cause the latter to perform its cutting function.

JOHN JANSSEN. 

